Querying the count of rows from a Cassandra table in a Java application could be a bit tricky, because you can’t use the com.datastax.driver.mapping.Result<T> return type with the returned Long value returned by the count.

If you are trying to do that you could get an exception containing something like this:

@Table annotation was not found on class java.lang.Long

Yes the Result<T> type can only be used if you have a @Table annotated class. But this solution is not for returning counts.

To return the count, you have to use com.datastax.driver.core.ResultSet as your return type. You could have a query like this in your @Accessor interface.